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lsfphelpls
Posts: 443
Joined: 3/16/2005
Status: offline
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Beginner PHP OOP Questions - 3/30/2008 16:18:35
PHP OOP Q:
vars such
private $var1; // are valid , or must get a start value ?
Inside a class function vars can declared with or without private/public ? WHAT IS THE DIFFERENCE ?
public function getSum() {
private $var1;
$var2=7;
.....
.....
} // end method
This is correct SQL Statement:
private $TableName="reserv";
private $first="Sam";
private $last="Smith";
public function getSum() {
$SQLstring="INSERT INTO $this->TableName VALUES(NULL,'$this->first','$this->last')";
.....
.....
} // end method
When I use an object in a subpage the corresponding class of this object must be attached in a php file or be in the <head> ? May ONLY have this class in the homepage ?
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Ryokotsusai
Posts: 248
Joined: 10/5/2005
Status: offline
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RE: Beginner PHP OOP Questions - 3/31/2008 0:48:04
quote:
vars such
private $var1; // are valid , or must get a start value ?
Yes you can declare them with or without a starting value:
public $var; // is valid
public $var2 = 'value'; // is valid
quote:
Inside a class function vars can declared with or without private/public ? WHAT IS THE DIFFERENCE ?
public function getSum() {
private $var1;
$var2=7;
to declare a variable, you must use public, private, or protected. To create a function you can use the same declarations, or you can leave them out and it will assume public.
public function func1() {}
// is exactly the same as
function func1() {}
as for the different types of declarations,
public: can be used outside the class ie:
class test {
public $var = "Test";
}
$class = new test;
echo $class->$var; //will echo "Test"
private / protected: I do not remember what the difference is between these 2, but using these will prevent that variable or function from being called outside of the class.
Hope that helps some...
_____________________________
The world is more like it is now than it ever has been before.
--Dwight Eisenhower
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lsfphelpls
Posts: 443
Joined: 3/16/2005
Status: offline
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RE: Beginner PHP OOP Questions - 3/31/2008 2:32:04
SQL statement is correct ?
Inside a class function, vars can declared with private/public or ONLY without ?
public function getSum() {
private $var1; // wrong ?
$var2=7; // correct ?
.....
.....
} // end method
When I use an object in a subpage the corresponding class of this object must be attached in a php file or be in the <head> ? May ONLY have this class in the homepage and access object of this class from the subpage ? in other words every time I use[in a file] $object= new className(); the class must exist in this file ?
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Ryokotsusai
Posts: 248
Joined: 10/5/2005
Status: offline
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RE: Beginner PHP OOP Questions - 3/31/2008 4:32:17
quote:
SQL statement is correct ?
If you are refering to this one:
quote:
$SQLstring="INSERT INTO $this->TableName VALUES(NULL,'$this->first','$this->last')";
then, it looks fine to me, that is how you would call those variables.
quote:
public function getSum() {
private $var1; // wrong ?
$var2=7; // correct ?
.....
.....
} // end method
inside of a method, $var2=7, would be correct
the class needs to be in a connected page or in the same page, ie:
class.php
<?php
class test {
function test_function() {
}
}
?>
index.php
<?php
include 'class.php';
$class = new test;
?>
would work fine
_____________________________
The world is more like it is now than it ever has been before.
--Dwight Eisenhower
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lsfphelpls
Posts: 443
Joined: 3/16/2005
Status: offline
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RE: Beginner PHP OOP Questions - 4/21/2008 11:05:55
answer asap this:
i)in js in a for loop the counter to increment one by one must be ...,++j;) or ...,j++;)
ii)null value considered and the value="" ?
iii)to set css text color to Transparent what to do ?
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alihammad
Posts: 1
Joined: 6/3/2008
Status: offline
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RE: Beginner PHP OOP Questions - 6/3/2008 2:47:01
Please tell me how to access global variables in a class..
Like if i want to access form variables through $_POST or $_GET .?
i did this and didnt work
class declaration
$form= new formcheck();
$form->printvar();
class definition
class formcheck()
{
protected $a;
function _construct()
{
$this->a= $_POST['name']
}
function printvar()
{
echo $this->a;
}
}
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